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