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