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