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