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