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