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