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