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