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