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)(17,18,22,30,21,24,20,26)(19,25,27,23,29,32,28,31)(1,3,4,7)(2,5,6,8)(9,10)(11,14)(12,13)(15,16)(17,19)(18,23)(20,27)(21,29)(22,28)(24,31)(25,30)(26,32)(2,6)(5,8)(10,13)(14,16)(18,24)(23,31)(25,32)(26,30) involution — undirected(10,13)(14,16)(17,19)(18,25)(20,28)(21,29)(22,27)(23,30)(24,32)(26,31) involution — undirected(9,11,12,15)(10,14,13,16)(17,20,21,22)(18,26,24,30)(19,27,29,28)(23,32,31,25)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.