One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,6,9,5,8,14,16)(3,10,12,13,11,7,15,4)(17,18,23,27,24,29,21,28)(19,30,32,40,34,47,33,46)(20,26,35,44,36,45,22,37)(25,39,42,48,43,38,41,31)(1,3)(2,7)(4,9)(5,11)(6,12)(8,10)(13,16)(14,15)(17,19)(18,25)(20,31)(21,33)(22,38)(23,32)(24,34)(26,40)(27,42)(28,41)(29,43)(30,37)(35,39)(36,48)(44,47)(45,46) involution — undirected(1,4,6,10,5,13,14,7)(2,3,9,12,8,11,16,15)(17,20,23,35,24,36,21,22)(18,26,27,44,29,45,28,37)(19,31,32,39,34,48,33,38)(25,40,42,47,43,46,41,30)(3,11)(4,13)(7,10)(12,15)(17,21,24,23)(18,27,29,28)(19,32,34,33)(20,22,36,35)(25,41,43,42)(26,44,45,37)(30,46,47,40)(31,39,48,38)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.