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