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