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