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