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