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