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