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