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