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