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