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