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