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