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