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