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