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