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