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