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)(12,13,15,16)(17,18)(19,25)(20,23)(21,24)(22,27)(26,31)(28,30)(29,32)(33,34,38,40)(35,39,42,36)(37,45,48,41)(43,44,46,47)(2,7)(4,10)(8,11)(12,15)(17,18,21,24)(19,25,27,22)(20,23,28,30)(26,31,32,29)(33,35)(34,39)(36,40)(37,46)(38,42)(41,44)(43,48)(45,47)(2,7)(5,9)(8,11)(13,16)(20,28)(23,30)(26,32)(29,31)(34,40)(35,42)(41,45)(43,46) involution — undirected(1,3,6,14)(2,8,7,11)(4,15,10,12)(5,13,9,16)(17,19,21,27)(18,22,24,25)(20,26,28,32)(23,29,30,31)(33,36,38,39)(34,35,40,42)(37,47,48,44)(41,46,45,43)(1,4,6,10)(2,9,7,5)(3,12,14,15)(8,13,11,16)(17,18)(19,25)(20,23)(21,24)(22,27)(26,31)(28,30)(29,32)(33,37,38,48)(34,41,40,45)(35,43,42,46)(36,44,39,47)(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)(33,35)(34,39)(36,40)(37,43)(38,42)(41,47)(44,45)(46,48)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.