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