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