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