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