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