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