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