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