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