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)(11,13,15,16)(17,18,23,27)(19,24,30,31)(20,29,26,22)(21,25,32,28)(1,3)(2,5)(4,8)(6,7)(9,11)(10,13)(12,15)(14,16)(17,19,23,30)(18,24,27,31)(20,25,26,28)(21,29,32,22)(11,15)(13,16)(17,20,22,18,23,26,29,27)(19,28,21,31,30,25,32,24)(2,6)(5,7)(17,21)(18,25)(19,29)(20,31)(22,30)(23,32)(24,26)(27,28) involution — undirected(3,8)(5,7)(11,15)(13,16)(19,30)(21,32)(24,31)(25,28) 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.