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