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