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