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