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