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)(11,15)(12,13)(14,16)(17,18)(19,26)(20,27)(21,25)(22,31)(23,28)(24,29)(30,32) involution — undirected(2,6)(7,8)(9,10)(11,14)(12,13)(15,16)(17,19,21,28)(18,23,25,26)(20,30,31,24)(22,32,27,29)(10,13)(14,15)(17,19,27,32,21,28,22,29)(18,24,31,23,25,30,20,26)(1,3,5,4)(2,7,6,8)(9,11,12,16)(10,14,13,15)(17,20,27,18,21,31,22,25)(19,26,32,24,28,23,29,30)(1,4,5,3)(2,7,6,8)(18,25)(20,31)(23,26)(24,30)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.