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