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