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