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