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