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