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