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