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