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