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