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