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