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