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