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