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