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