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