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