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