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