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