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