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