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