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