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