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