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