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