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