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