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