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