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