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