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