One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,11)(4,10)(5,8)(6,12)(7,9)(13,16)(14,15)(17,18)(19,26)(20,24)(21,23)(22,25)(27,32)(28,31)(29,30)(33,34)(35,39)(36,45)(37,41)(38,42)(40,44)(43,48)(46,47) involution — undirected(1,3,7,5)(2,8,9,11)(4,15,12,13)(6,14,10,16)(17,19,22,21)(18,23,25,26)(20,27,28,29)(24,30,31,32)(33,35,38,43)(34,39,42,48)(36,37,44,47)(40,46,45,41)(2,9)(4,12)(8,11)(13,15)(20,28)(24,31)(27,29)(30,32)(35,43)(36,44)(39,48)(40,45) involution — undirected(1,4)(2,10)(3,13)(5,15)(6,9)(7,12)(8,14)(11,16)(17,20)(18,24)(19,27)(21,29)(22,28)(23,30)(25,31)(26,32)(33,36)(34,40)(35,37)(38,44)(39,46)(41,48)(42,45)(43,47) involution — undirected(1,5,7,3)(2,11,9,8)(4,15,12,13)(6,14,10,16)(17,18)(19,23)(20,24)(21,26)(22,25)(27,30)(28,31)(29,32)(33,34)(35,39)(36,40)(37,46)(38,42)(41,47)(43,48)(44,45)(1,6,7,10)(2,12,9,4)(3,14,5,16)(8,13,11,15)(17,21,22,19)(18,23,25,26)(20,27,28,29)(24,32,31,30)(33,37)(34,41)(35,44)(36,43)(38,47)(39,40)(42,46)(45,48)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.