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)(4,12,14,13)(6,10,16,15)(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)(4,14)(8,11)(12,13)(20,28)(24,31)(27,29)(30,32)(35,43)(36,44)(39,48)(40,45) involution — undirected(1,4,7,14)(2,10,9,15)(3,13,5,12)(6,11,16,8)(17,20,22,28)(18,24,25,31)(19,27,21,29)(23,30,26,32)(33,36)(34,40)(35,37)(38,44)(39,46)(41,48)(42,45)(43,47)(1,5,7,3)(2,11,9,8)(4,12,14,13)(6,10,16,15)(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)(1,6,7,16)(2,12,9,13)(3,10,5,15)(4,8,14,11)(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.