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