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