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