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