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