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