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