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