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