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