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)(20,25,35,42)(21,26,36,43)(22,37,34,27)(24,38,41,32)(30,40,46,48)(31,45,47,39)(9,11)(10,13)(12,15)(14,16)(17,19)(18,24)(20,30)(21,31)(22,38)(23,33)(25,39)(26,40)(27,44)(28,41)(29,37)(32,34)(35,46)(36,47)(42,45)(43,48) involution — undirected(2,5)(6,8)(11,15)(13,16)(17,20,23,35)(18,25,28,42)(19,30,33,46)(21,34,36,22)(24,39,41,45)(26,27,43,37)(29,40,44,48)(31,32,47,38)(11,15)(13,16)(17,21)(18,26)(19,31)(20,34)(22,35)(23,36)(24,40)(25,27)(28,43)(29,45)(30,32)(33,47)(37,42)(38,46)(39,44)(41,48) involution — undirected(1,3,4,7)(2,6,5,8)(10,14)(13,16)(20,35)(21,36)(25,42)(26,43)(30,46)(31,47)(39,45)(40,48)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.