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