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