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