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