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