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