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