One vertex per element, one color per generator, with an edge from x to x·s.
(5,6,10,14)(7,15,17,11)(8,12,9,13)(16,20,18,19)(21,22,26,28)(23,25,30,34)(24,27,32,35)(29,33,31,36)(2,3)(5,7)(6,11)(8,16)(9,18)(10,17)(12,19)(13,20)(14,15) involution — undirected(1,2,4,3)(5,8,10,9)(6,12,14,13)(7,16,17,18)(11,19,15,20)(21,23,25,28,26,30,34,22)(24,31,33,27,32,29,36,35)(5,8,10,9)(6,13,14,12)(7,16,17,18)(11,20,15,19)(21,24)(22,27)(23,29)(25,33)(26,32)(28,35)(30,31)(34,36)(1,3,4,2)(5,9,10,8)(6,13,14,12)(7,16,17,18)(11,19,15,20)(24,32)(27,35)(29,31)(33,36)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.