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