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