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