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