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