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