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