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