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)(11,13)(12,14)(15,16)(17,18,24,29)(19,25,30,26)(20,31,21,27)(22,28,23,32)(1,3,5,8)(2,6,4,7)(9,11,13,10)(12,14,16,15)(17,19)(18,25)(20,23)(21,22)(24,30)(26,29)(27,28)(31,32)(10,11)(12,16)(17,20)(18,26)(19,23)(21,24)(22,30)(25,29)(27,28)(31,32) involution — undirected(1,4,5,2)(3,6,8,7)(9,12,13,16)(10,14,11,15)(17,21,24,20)(18,27,29,31)(19,22,30,23)(25,28,26,32)(10,11)(14,15)(17,22,24,23)(18,28,29,32)(19,20,30,21)(25,31,26,27)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.