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)(19,24)(20,23)(21,25)(22,26)(27,29)(28,31)(30,32)(33,34,39,41)(35,44,38,40)(36,42,46,48)(37,45,47,43)(1,3)(2,5)(4,7)(6,10)(8,11)(9,13)(12,15)(14,16)(17,19)(18,21)(20,27)(22,25)(23,30)(24,26)(28,32)(29,31)(33,35,39,38)(34,40,41,44)(36,43,46,45)(37,42,47,48)(2,8)(3,4)(9,16)(10,12)(20,28)(23,31)(27,32)(29,30)(34,41)(36,46)(40,44)(43,45) involution — undirected(1,4,7,3)(2,5,8,11)(6,10,15,12)(9,14,16,13)(17,20)(18,23)(19,27)(21,30)(22,28)(24,29)(25,32)(26,31)(33,36,39,46)(34,42,41,48)(35,45,38,43)(37,44,47,40)(1,5)(2,3)(4,8)(6,14)(7,11)(9,12)(10,16)(13,15)(17,19)(18,24)(20,27)(21,26)(22,25)(23,29)(28,32)(30,31)(33,37)(34,43)(35,42)(36,44)(38,48)(39,47)(40,46)(41,45) involution — undirected(1,6)(2,9)(3,10)(4,12)(5,13)(7,15)(8,16)(11,14)(17,21,22,24)(18,25,26,19)(20,29,28,30)(23,27,31,32)(33,38,39,35)(34,40,41,44)(36,45,46,43)(37,42,47,48)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.