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