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)(11,13)(12,14)(15,16)(17,18,21,23)(19,20,28,30)(22,24,26,27)(25,31,32,29)(1,3)(2,5)(4,8)(6,7)(9,11,12,15)(10,13,14,16)(18,23)(19,25)(20,29)(22,26)(28,32)(30,31)(10,14)(13,16)(17,19,26,32,21,28,22,25)(18,20,27,29,23,30,24,31)(2,6)(5,7)(18,23)(20,30)(24,27)(29,31) involution — undirected(3,8)(5,7)(17,20,26,29,21,30,22,31)(18,19,27,32,23,28,24,25)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.