One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,6)(5,8)(17,18,21,25)(19,26,22,23)(20,28,30,31)(24,29,32,27)(1,3)(2,5)(4,8)(6,7)(9,10)(11,15)(12,13)(14,16)(17,19,21,22)(18,23,25,26)(20,29,30,27)(24,31,32,28)(10,13)(14,15)(17,20)(18,24)(19,27)(21,30)(22,29)(23,28)(25,32)(26,31) involution — undirected(2,6)(5,7)(17,19,21,22)(18,23,25,26)(20,27,30,29)(24,28,32,31)(3,8)(5,7)(9,11,12,16)(10,14,13,15)(20,30)(24,32)(27,29)(28,31)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.