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