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