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