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