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