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