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