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