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)(17,18,21,23)(19,20,24,22)(27,31)(29,32)(1,3,5,8)(2,6,7,4)(9,11)(10,12)(13,14)(15,16)(17,19)(18,22)(20,23)(21,24)(25,26,28,30)(27,29,31,32)(2,7)(4,6)(9,12,13,16)(10,14,15,11)(17,19,21,24)(18,22,23,20)(25,26)(27,29)(28,30)(31,32)(1,3)(2,4)(5,8)(6,7)(9,11)(10,12)(13,14)(15,16)(17,20)(18,19)(21,22)(23,24) involution — undirected(1,4)(2,3)(5,6)(7,8)(9,12)(10,11)(13,16)(14,15)(17,19)(18,20)(21,24)(22,23)(25,27)(26,29)(28,31)(30,32) 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.