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