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