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