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