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