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