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