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