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