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