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