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