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