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