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