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)(17,18,23,25)(19,26,20,24)(21,22,28,27)(29,32,31,30)(1,2)(3,6)(4,7)(5,8)(17,19)(18,24)(20,23)(21,31)(22,32)(25,26)(27,30)(28,29) involution — undirected(10,13)(14,15)(18,25)(19,20)(22,27)(29,31) involution — undirected(1,3,5,4)(2,6,8,7)(9,10)(11,14)(12,13)(15,16)(17,20,23,19)(18,26,25,24)(21,31,28,29)(22,32,27,30)(1,3,5,4)(2,6,8,7)(9,11)(10,14)(12,16)(13,15)(17,21,23,28)(18,27,25,22)(19,29,20,31)(24,32,26,30)(1,4,5,3)(2,7,8,6)(17,22,23,27)(18,28,25,21)(19,30,20,32)(24,31,26,29)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.