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