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