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