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