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