One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,10)(4,12)(5,7)(6,9)(8,14)(11,15)(13,16)(17,18)(19,26)(20,29)(21,28)(22,24)(23,25)(27,31)(30,32)(33,34)(35,42)(36,39)(37,40)(38,41)(43,48)(44,46)(45,47) involution — undirected(1,3,6,5)(2,7,9,10)(4,11,14,13)(8,15,12,16)(17,19,23,28)(18,21,25,26)(20,30,22,27)(24,32,29,31)(36,44)(39,46)(43,47)(45,48)(17,20,23,22)(18,24,25,29)(19,27,28,30)(21,31,26,32)(33,35,38,40)(34,37,41,42)(36,43,44,47)(39,45,46,48)(1,4)(2,8)(3,11)(5,13)(6,14)(7,15)(9,12)(10,16)(17,21)(18,19)(20,31)(22,32)(23,26)(24,27)(25,28)(29,30)(33,36)(34,39)(35,43)(37,45)(38,44)(40,47)(41,46)(42,48) involution — undirected(1,5,6,3)(2,7,9,10)(4,13,14,11)(8,15,12,16)(17,18)(19,21)(20,24)(22,29)(23,25)(26,28)(27,31)(30,32)(33,34)(35,37)(36,39)(38,41)(40,42)(43,45)(44,46)(47,48)(1,2)(3,7)(4,8)(5,10)(6,9)(11,15)(12,14)(13,16)(17,22,23,20)(18,24,25,29)(19,27,28,30)(21,32,26,31)(33,37)(34,40)(35,41)(36,45)(38,42)(39,47)(43,46)(44,48)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.