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