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