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