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